20015645

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{853}}^1$

素因数の和:909

約数の個数: 24

約数和(自身を含む): 27331416

約数和(自身を除く): 7315771

約数列:

[1, 5, 13, 19, 65, 95, 247, 361, 853, 1235, 1805, 4265, 4693, 11089, 16207, 23465, 55445, 81035, 210691, 307933, 1053455, 1539665, 4003129, 20015645]

約数ペア:

[(1, 20015645), (5, 4003129), (13, 1539665), (19, 1053455), (65, 307933), (95, 210691), (247, 81035), (361, 55445), (853, 23465), (1235, 16207), (1805, 11089), (4265, 4693)]